Five Eyes Alliance

Five Eyes Alliance

  • The Five Eyes alliance is an intelligence-sharing arrangement between five English-speaking democracies: the US, UK, Canada, Australia, and New Zealand.
  • The alliance was created during the Cold War (1946-1991) and was fought between the United States and the Soviet Union, as well as their respective allies.
  • The alliance was needed to share sensitive information regarding their adversaries on all possible fronts available.
  • It is often described as the world’s most successful intelligence alliance.


  • These partner nations exchange a wide spectrum of intelligence within one of the world’s most tightly-knit multilateral agreements as part of the collaboration.
  • Following its origin, the agency later enlarged its core group to ‘Nine Eyes’ and 14 Eyes alliances as well, encompassing more countries as security partners.
  • The ‘Nine Eyes’ group expands to cover the Netherlands, Denmark, France, and Norway, whereas the 14 Eyes bloc further includes Belgium, Italy, Germany, Spain, and Sweden.
  • Why was the Five Eyes Alliance Formed?
  • The alliance’s origins can be traced back to the Second World War. The UK and the US decided to share intelligence after successfully breaking German and Japanese codes, respectively.
  • In 1943, the Britain-USA (BRUSA) agreement laid the foundations for what would become the UK-USA (UKUSA) agreement.
  • BRUSA was signed to share intelligence information between the two countries to support US forces in Europe
  • Following this, the UKUSA (UK-USA) was signed in 1946. Canada joined it in 1949, and New Zealand and Australia did so in 1956, forming the alliance.
  • The Agreement was not officially acknowledged though its existence was known about from the 1980s. But in 2010, the UKUSA agreement files were released.

How does the Five Eyes Alliance Work?

  • Countries often engage with each other on matters of intelligence gathering and security.
  • In recent years, common interests, such as balancing the rise of China, have led to a closer alignment among the Five Eyes countries.
  • Their closeness has also been attributed to a common language and mutual trust built over decades of association.
  • In 2016, the Five Eyes Intelligence Oversight and Review Council came into being. It includes the non-political intelligence oversight, review, and security entities of the Five Eyes countries.